shizaQuinn shizaQuinn

17-10-2016
Mathematics

contestada

1) Write 18 out of 24 as a percentage

2) Find 45% of 500

3) Factorise 4b2 + 16b

4) Expand (a - 1)(a + 2)

5) Factorise x2 + 8x + 7

Respuesta :

17-10-2016

1.) 18/24 = 0.75 = 75%

2.) 500 * 0.45 = 225

3.) 4b^2 + 16b
4b(b + 4)

4.) (a - 1)(a + 2)
Use FOIL (first, outer, inner, last) to solve.
a^2 + 2a - a - 2
a^2 + a - 2

5.) x^2 + 8x + 7
(x + 1)(x + 7)

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